Two wires, one of copper and other of iron, are of the same length oand same readius. Which will have more resistance? Give reason.
Specific resistance of iron is more than that of copper.

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Solution

Resistance is given by $\frac{ρ l}{A}$ .

Iron wire will have more resistance than copper wire of the same length and same radius because the resistivity of iron is more than that of copper.

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Two wires, one of copper and other of iron, are of the same length oand same readius. Which will have more resistance? Give reason. Specific resistance of iron is more than that of copper.

Resistance is given by ρlA. Iron wire will have more resistance than copper wire of the same length and same radius because the resistivity of iron is more than that of copper.

Two wires, one of copper and other of iron, are of the same length oand same readius. Which will have more resistance? Give reason.
Specific resistance of iron is more than that of copper.

Resistance is given by $\frac{ρ l}{A}$ .

Iron wire will have more resistance than copper wire of the same length and same radius because the resistivity of iron is more than that of copper.